diff mbox series

[v6,13/16] drm/i915/perf: Save/restore EU flex counters across reset

Message ID 20221026222102.5526-14-umesh.nerlige.ramappa@intel.com (mailing list archive)
State New, archived
Headers show
Series Add DG2 OA support | expand

Commit Message

Umesh Nerlige Ramappa Oct. 26, 2022, 10:20 p.m. UTC 
If a drm client is killed, then hw contexts used by the client are reset
immediately. This reset clears the EU flex counter configuration. If an
OA use case is running in parallel, it would start seeing zeroed eu
counter values following the reset even if the drm client is restarted.
Save/restore the EU flex counter config so that the EU counters can be
monitored continuously across resets.

v2:
- Save/restore eu flex config only for gen12, as for pre-gen12, these
  are saved and restored in the context image.

Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
index 34ef4f36e660..a419d60166c8 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
@@ -392,6 +392,16 @@  static int guc_mmio_regset_init(struct temp_regset *regset,
 		else
 			ret |= GUC_MMIO_REG_ADD(gt, regset, GEN9_LNCFCMOCS(i), false);
 
+	if (GRAPHICS_VER(engine->i915) >= 12) {
+		ret |= GUC_MMIO_REG_ADD(gt, regset, EU_PERF_CNTL0, false);
+		ret |= GUC_MMIO_REG_ADD(gt, regset, EU_PERF_CNTL1, false);
+		ret |= GUC_MMIO_REG_ADD(gt, regset, EU_PERF_CNTL2, false);
+		ret |= GUC_MMIO_REG_ADD(gt, regset, EU_PERF_CNTL3, false);
+		ret |= GUC_MMIO_REG_ADD(gt, regset, EU_PERF_CNTL4, false);
+		ret |= GUC_MMIO_REG_ADD(gt, regset, EU_PERF_CNTL5, false);
+		ret |= GUC_MMIO_REG_ADD(gt, regset, EU_PERF_CNTL6, false);
+	}
+
 	return ret ? -1 : 0;
 }